package org.smart.chapter2.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class PropsUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);

    /*加载属性文件*/
    public static Properties loadProps(String fileName) {
        Properties properties = null;
        InputStream inputStream = null;
        try {
            inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (inputStream == null) {
                throw new FileNotFoundException(fileName + "file is not found");
            }
            properties = new Properties();
            properties.load(inputStream);
        } catch (IOException e) {
            LOGGER.error("close input stream failre", e);
        }finally {
            if(inputStream!=null){
                try {
                    inputStream.close();
                }catch (IOException e){
                    LOGGER.error("close input stream failure",e);
                }
            }
        }
        return properties;
    }

    /*
    * 获取字符型属性（默认值为空的字符串）
    * */
    public static String getString(Properties properties, String key) {
        return getString(properties, key,"");
    }

    private static String getString(Properties properties, String key, String defaultValue) {
        String value=defaultValue;
        if(properties.contains(key)){
            value = properties.getProperty(key);
        }
        return value;
    }
    /*
    * 获取数值型的属性（默认值是0)
    * */
    public static int getInt(Properties properties,String key){
        return getInt(properties, key, 0);
    }

    private static int getInt(Properties properties, String key, int defaultValue) {
        int value=defaultValue;
        if(properties.contains(key)){
            value = CastUtil.castInt(properties.getProperty(key));
        }
        return value;
    }
    /**
     * 获取布尔型属性（默认值为 false）
     */
    public static boolean getBoolean(Properties props, String key) {
        return getBoolean(props, key, false);
    }

    /**
     * 获取布尔型属性（可指定默认值）
     */
    public static boolean getBoolean(Properties props, String key, boolean defaultValue) {
        boolean value = defaultValue;
        if (props.containsKey(key)) {
            value = CastUtil.castBoolean(props.getProperty(key));
        }
        return value;
    }
}
